C# Linq包含在嵌套的分组查询中
下面我有一个相对复杂的查询,其中包含一些嵌套的GROUPBY查询。问题是,我不知道如何将include添加到任何GROUPBY查询中。有没有办法在EF6的子组查询中包含子属性C# Linq包含在嵌套的分组查询中,c#,.net,entity-framework,linq,entity-framework-6,C#,.net,Entity Framework,Linq,Entity Framework 6,下面我有一个相对复杂的查询,其中包含一些嵌套的GROUPBY查询。问题是,我不知道如何将include添加到任何GROUPBY查询中。有没有办法在EF6的子组查询中包含子属性 return db.PatientOrders .Include(x => x.Patient) // this has no effect .Where(x => !x.ProcessedOn.HasValue && x.Pati
return db.PatientOrders
.Include(x => x.Patient) // this has no effect
.Where(x => !x.ProcessedOn.HasValue && x.Patient.Home.PharmacyId == pharmacyID)
.GroupBy(x => x.Patient.Home)
.ToDictionary(x => x.Key, x => x
.ToList()
.GroupBy(y => y.Patient.Department)
.ToDictionary(y => y.Key, y => y
.Include(x => x.OrderLines) // this does not compile
.ToList()
.GroupBy(z => z.Patient)
.ToDictionary(z => z.Key, z => z.ToList(), new PatientEqualityComparer()), new HomeDepartmentEqualityComparer()), new HomeEqualityComparer());
我找到了一种方法,但我不确定该解决方案是否具有良好的性能
// group by reshapes query so previous includes are lost
// solution: flatten after group by then do includes then group by again
return db.PatientOrders
.GroupBy(x => x.Patient.Home) // Group
.SelectMany(g => g.AsEnumerable()) // Ungroup
.Include(x => x.Patient)
.Include(x => x.Patient.Home)
.Include(x => x.Patient.Doctor)
.Include(x => x.Patient.Department)
.Include(x => x.OrderLines)
.Include(x => x.OrderLines.Select(y => y.Product))
.Where(x => !x.ProcessedOn.HasValue && x.Patient.Home.PharmacyId == pharmacyID)
.AsEnumerable() // Switch to LINQ to Objects
.GroupBy(x => x.Patient.Home) // Group again
.ToDictionary(x => x.Key, x => x
.ToList()
.GroupBy(y => y.Patient.Department)
.ToDictionary(y => y.Key, y => y
.ToList()
.GroupBy(z => z.Patient)
.ToDictionary(z => z.Key, z => z.ToList(), new PatientEqualityComparer()), new HomeDepartmentEqualityComparer()), new HomeEqualityComparer());
我找到了一种方法,但我不确定该解决方案是否具有良好的性能
// group by reshapes query so previous includes are lost
// solution: flatten after group by then do includes then group by again
return db.PatientOrders
.GroupBy(x => x.Patient.Home) // Group
.SelectMany(g => g.AsEnumerable()) // Ungroup
.Include(x => x.Patient)
.Include(x => x.Patient.Home)
.Include(x => x.Patient.Doctor)
.Include(x => x.Patient.Department)
.Include(x => x.OrderLines)
.Include(x => x.OrderLines.Select(y => y.Product))
.Where(x => !x.ProcessedOn.HasValue && x.Patient.Home.PharmacyId == pharmacyID)
.AsEnumerable() // Switch to LINQ to Objects
.GroupBy(x => x.Patient.Home) // Group again
.ToDictionary(x => x.Key, x => x
.ToList()
.GroupBy(y => y.Patient.Department)
.ToDictionary(y => y.Key, y => y
.ToList()
.GroupBy(z => z.Patient)
.ToDictionary(z => z.Key, z => z.ToList(), new PatientEqualityComparer()), new HomeDepartmentEqualityComparer()), new HomeEqualityComparer());